You're in a room with no windows and no doors. All that's in there is a table and a mirror. How do you get out?
You look in the mirror see what you saw.
Take the saw cut the table in half two halves, take the two halves and make a whole.
Use the hole to escape.
Why this works
This riddle plays with the double meanings of words and a bit of clever imagery. First, when you "look in the mirror," you see a reflection of yourself, but the phrase "see what you saw" cleverly suggests that you see a "saw." The next part of the riddle requires a playful interpretation of "cutting the table in half," which means you literally split it into two pieces, but also leads to the creation of the word "whole" from the phrase "two halves make a whole." Finally, the "hole" you create gives you a way to "escape," turning a seemingly impossible situation into a fun, imaginative solution!